Modeling the evolution of drug resistance in malaria.

Modeling the evolution of drug resistance in malaria.
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DOI:
10.1007/s10822-012-9618-2
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发表时间:
2012-12
影响因子:
3.5
通讯作者:
Fogel, Gary B.
Fogel, Gary B.
中科院分区:
生物学3区
文献类型:
--
作者:
Hecht, David;Fogel, Gary B.

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恶性疟原虫是疟疾的病原体,它继续对氯喹和磺胺乙胺嘧啶等一线治疗药物产生抗药性。在这里,我们研究了二氢叶酸还原酶(DHFR)中的氨基酸替换,这些氨基酸替换赋予对乙胺嘧啶的抗性,同时仍然结合天然DHFR底物7,8-二氢叶酸和辅因子NADPH。导致耐药性的氨基酸替换链可以在计算机中推断出来,从而更广泛地理解药物和靶标之间的共同进化。这种计算机模拟的方法表明,只有一小部分特定的活性位点以适当的顺序替换,才能导致今天野生环境中的耐药菌株。类似的方法可以用于任何感兴趣的靶标,以预测未来耐药性的可能途径,从而进行更有效的药物开发。
Plasmodium falciparum, the causal agent of malaria, continues to evolve resistance to frontline therapeutics such as chloroquine and sulfadoxine-pyrimethamine. Here we study the amino acid replacements in dihydrofolate reductase (DHFR) that confer resistance to pyrimethamine while still binding the natural DHFR substrate, 7,8-dihydrofolate, and cofactor, NADPH. The chain of amino acid replacements that has led to resistance can be inferred in a computer, leading to a broader understanding of the coevolution between the drug and target. This in silico approach suggests that only a small set of specific active site replacements in the proper order could have led to the resistant strains in the wild today. A similar approach can be used on any target of interest to anticipate likely pathways of future resistance for more effective drug development.
DOI: 10.1007/s10822-007-9152-9
发表时间: 2008-01-01
影响因子: 3.5
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